Hello, as the original message never got accepted to the mailinglist, I quote it here completely:
Kevin Jung wrote > Hi all, > The size of shuffle write showing in spark web UI is much different when I > execute same spark job on same input data(100GB) in both spark 1.1 and > spark 1.2. > At the same sortBy stage, the size of shuffle write is 39.7GB in spark 1.1 > but 91.0GB in spark 1.2. > I set spark.shuffle.manager option to hash because it's default value is > changed but spark 1.2 writes larger file than spark 1.1. > Can anyone tell me why this happens? > > Thanks > Kevin I'm experiencing the same thing with my job and that's what I tested: * Spark 1.2.0 with Sort-based Shuffle * Spark 1.2.0 with Hash-based Shuffle * Spark 1.2.1 with Sort-based Shuffle All three combinations show the same behaviour, which contrasts from Spark 1.1.0. In Spark 1.1.0, my job runs for about an hour, in Spark 1.2.x it runs for almost four hours. Configuration is identical otherwise - I only added org.apache.spark.scheduler.CompressedMapStatus to the Kryo registrator for Spark 1.2.0 to cope with https://issues.apache.org/jira/browse/SPARK-5102. As a consequence (I think, but causality might be different) I see lots and lots of disk spills. I cannot provide a small test case, but maybe the log entries for a single worker thread can help someone investigate on this. (See below.) I will also open up an issue, if nobody stops me by providing an answer ;) Any help will be greatly appreciated, because otherwise I'm stuck with Spark 1.1.0, as quadrupling runtime is not an option. Sincerely, Chris 2015-02-09T14:06:06.328+01:00 INFO org.apache.spark.executor.Executor Running task 9.0 in stage 18.0 (TID 300) Executor task launch worker-18 2015-02-09T14:06:06.351+01:00 INFO org.apache.spark.CacheManager Partition rdd_35_9 not found, computing it Executor task launch worker-18 2015-02-09T14:06:06.351+01:00 INFO org.apache.spark.storage.ShuffleBlockFetcherIterator Getting 10 non-empty blocks out of 10 blocks Executor task launch worker-18 2015-02-09T14:06:06.351+01:00 INFO org.apache.spark.storage.ShuffleBlockFetcherIterator Started 0 remote fetches in 0 ms Executor task launch worker-18 2015-02-09T14:06:07.396+01:00 INFO org.apache.spark.storage.MemoryStore ensureFreeSpace(2582904) called with curMem=300174944, maxMe... Executor task launch worker-18 2015-02-09T14:06:07.397+01:00 INFO org.apache.spark.storage.MemoryStore Block rdd_35_9 stored as bytes in memory (estimated size 2.5... Executor task launch worker-18 2015-02-09T14:06:07.398+01:00 INFO org.apache.spark.storage.BlockManagerMaster Updated info of block rdd_35_9 Executor task launch worker-18 2015-02-09T14:06:07.399+01:00 INFO org.apache.spark.CacheManager Partition rdd_38_9 not found, computing it Executor task launch worker-18 2015-02-09T14:06:07.399+01:00 INFO org.apache.spark.storage.ShuffleBlockFetcherIterator Getting 10 non-empty blocks out of 10 blocks Executor task launch worker-18 2015-02-09T14:06:07.400+01:00 INFO org.apache.spark.storage.ShuffleBlockFetcherIterator Started 0 remote fetches in 0 ms Executor task launch worker-18 2015-02-09T14:06:07.567+01:00 INFO org.apache.spark.storage.MemoryStore ensureFreeSpace(944848) called with curMem=302757848, maxMem... Executor task launch worker-18 2015-02-09T14:06:07.568+01:00 INFO org.apache.spark.storage.MemoryStore Block rdd_38_9 stored as values in memory (estimated size 92... Executor task launch worker-18 2015-02-09T14:06:07.569+01:00 INFO org.apache.spark.storage.BlockManagerMaster Updated info of block rdd_38_9 Executor task launch worker-18 2015-02-09T14:06:07.573+01:00 INFO org.apache.spark.storage.ShuffleBlockFetcherIterator Getting 34 non-empty blocks out of 50 blocks Executor task launch worker-18 2015-02-09T14:06:07.573+01:00 INFO org.apache.spark.storage.ShuffleBlockFetcherIterator Started 0 remote fetches in 1 ms Executor task launch worker-18 2015-02-09T14:06:38.931+01:00 INFO org.apache.spark.CacheManager Partition rdd_41_9 not found, computing it Executor task launch worker-18 2015-02-09T14:06:38.931+01:00 INFO org.apache.spark.storage.ShuffleBlockFetcherIterator Getting 3 non-empty blocks out of 10 blocks Executor task launch worker-18 2015-02-09T14:06:38.931+01:00 INFO org.apache.spark.storage.ShuffleBlockFetcherIterator Started 0 remote fetches in 0 ms Executor task launch worker-18 2015-02-09T14:06:38.945+01:00 INFO org.apache.spark.storage.MemoryStore ensureFreeSpace(0) called with curMem=307529127, maxMem=9261... Executor task launch worker-18 2015-02-09T14:06:38.945+01:00 INFO org.apache.spark.storage.MemoryStore Block rdd_41_9 stored as bytes in memory (estimated size 0.0... Executor task launch worker-18 2015-02-09T14:06:38.946+01:00 INFO org.apache.spark.storage.BlockManagerMaster Updated info of block rdd_41_9 Executor task launch worker-18 2015-02-09T14:06:38.946+01:00 WARN org.apache.spark.storage.BlockManager Block rdd_41_9 replicated to only 0 peer(s) instead of 1 pee... Executor task launch worker-18 2015-02-09T14:06:39.088+01:00 INFO org.apache.spark.storage.BlockManager Found block rdd_3_9 locally Executor task launch worker-18 2015-02-09T14:06:41.389+01:00 INFO org.apache.spark.CacheManager Partition rdd_7_9 not found, computing it Executor task launch worker-18 2015-02-09T14:06:41.389+01:00 INFO org.apache.spark.storage.ShuffleBlockFetcherIterator Getting 1 non-empty blocks out of 1 blocks Executor task launch worker-18 2015-02-09T14:06:41.389+01:00 INFO org.apache.spark.storage.ShuffleBlockFetcherIterator Started 0 remote fetches in 0 ms Executor task launch worker-18 2015-02-09T14:06:41.402+01:00 INFO org.apache.spark.storage.MemoryStore ensureFreeSpace(38144) called with curMem=307529151, maxMem=... Executor task launch worker-18 2015-02-09T14:06:41.402+01:00 INFO org.apache.spark.storage.MemoryStore Block rdd_7_9 stored as values in memory (estimated size 37.... Executor task launch worker-18 2015-02-09T14:06:41.404+01:00 INFO org.apache.spark.storage.BlockManagerMaster Updated info of block rdd_7_9 Executor task launch worker-18 2015-02-09T14:07:00.019+01:00 INFO org.apache.spark.CacheManager Partition rdd_73_9 not found, computing it Executor task launch worker-18 2015-02-09T14:07:00.019+01:00 INFO org.apache.spark.storage.ShuffleBlockFetcherIterator Getting 1 non-empty blocks out of 1 blocks Executor task launch worker-18 2015-02-09T14:07:00.019+01:00 INFO org.apache.spark.storage.ShuffleBlockFetcherIterator Started 0 remote fetches in 0 ms Executor task launch worker-18 2015-02-09T14:07:00.185+01:00 INFO org.apache.spark.storage.MemoryStore ensureFreeSpace(826250) called with curMem=307567295, maxMem... Executor task launch worker-18 2015-02-09T14:07:00.185+01:00 INFO org.apache.spark.storage.MemoryStore Block rdd_73_9 stored as values in memory (estimated size 80... Executor task launch worker-18 2015-02-09T14:07:00.186+01:00 INFO org.apache.spark.storage.BlockManagerMaster Updated info of block rdd_73_9 Executor task launch worker-18 2015-02-09T14:07:00.190+01:00 INFO org.apache.spark.storage.BlockManager Found block rdd_35_9 locally Executor task launch worker-18 2015-02-09T14:07:00.190+01:00 INFO org.apache.spark.storage.BlockManager Found block rdd_38_9 locally Executor task launch worker-18 2015-02-09T14:07:00.194+01:00 INFO org.apache.spark.storage.ShuffleBlockFetcherIterator Getting 34 non-empty blocks out of 50 blocks Executor task launch worker-18 2015-02-09T14:07:00.194+01:00 INFO org.apache.spark.storage.ShuffleBlockFetcherIterator Started 0 remote fetches in 1 ms Executor task launch worker-18 2015-02-09T14:07:17.967+01:00 INFO org.apache.spark.util.collection.ExternalAppendOnlyMap Thread 117 spilling in-memory map of 670.2 MB to disk (1 tim... Executor task launch worker-18 2015-02-09T14:07:46.716+01:00 INFO org.apache.spark.storage.BlockManager Found block rdd_41_9 locally Executor task launch worker-18 2015-02-09T14:07:47.603+01:00 INFO org.apache.spark.storage.BlockManager Found block rdd_3_9 locally Executor task launch worker-18 2015-02-09T14:07:47.897+01:00 INFO org.apache.spark.util.collection.ExternalAppendOnlyMap Thread 117 spilling in-memory map of 5.0 MB to disk (1 time ... Executor task launch worker-18 2015-02-09T14:07:48.270+01:00 INFO org.apache.spark.util.collection.ExternalAppendOnlyMap Thread 117 spilling in-memory map of 5.0 MB to disk (2 times... Executor task launch worker-18 2015-02-09T14:07:48.727+01:00 INFO org.apache.spark.util.collection.ExternalAppendOnlyMap Thread 117 spilling in-memory map of 5.0 MB to disk (3 times... Executor task launch worker-18 2015-02-09T14:07:49.021+01:00 INFO org.apache.spark.util.collection.ExternalAppendOnlyMap Thread 117 spilling in-memory map of 5.0 MB to disk (4 times... Executor task launch worker-18 -- View this message in context: http://apache-spark-user-list.1001560.n3.nabble.com/Shuffle-write-increases-in-spark-1-2-tp20894p21570.html Sent from the Apache Spark User List mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@spark.apache.org For additional commands, e-mail: user-h...@spark.apache.org
